Caps/Septa, Crimp, headspace, 20 mm, Silver Aluminum Cap, PTFE/Silicone Septa, Certified, 100 LabZhang 100pcs 10ml Vials-Glass Clear Bottom Headspace Vial with Plastic-Aluminum Flip Off Caps and Rubber Stoppers,Transparent Glass Headspace Vials,10ml Capacity(Transparent) Autosampler Vials, Membrane Solutions 2ml HPLC Vials, 9-425 Lab